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Patented June 20, 1882.

.Witnases- UNITED "STATES PATENT OFFICE.

JAMES TRIPP AND JOHN H. OSBORN, OF CLEVELAND, OHIO, ASSIGNORS OFONE-THIRD TO SAMUEL E. HENDERSON, OF KAN-SAS CITY, MISSOURI.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 259,732, dated June 2o,1882.

Application filed April 13, 1882. (Model.)

To all whom it may concern:

chines are simpliedin the details of structure and easily adjustable inthe combination of' parts', rendering the same light-running, durable,and readily understood and manipulated by the operator.

In the following specification will be found a full and completedescription of the several improvements above alluded to, which areillustrated by the accompanying drawings, making a part of thisspecification, in which Figure `l shows a vertical longitudinal sectionof the arnand bed-plate of the improved machine, showing the workingparts therein. Fig. 2 represents an under side view of the machine. Therest of the figures are detached sections, to which reference will bemade.

Like letters of reference refer to like parts in the several views.

The above-said improved machine is in its general structure not unlikethosein ordinary use. Hence a description th ereofis not thoughtessential for a full understanding of the improvements alluded to, asthe general structure ofthe machine' will be made manifest in the courseof a description of the said improvements.

The bifurcated end or fork of the vibra tory lever B, connecting thecrank C of the main shaft C to the shuttle-lever D, is provided With apair of self-adjusting blocks, E and F, Figs. l, 6, and 7. Said blocksare secured respectively to the inner sides of the fork A, and form abearing-surface for the movement of the crank of the shaft C', as seeninFigs. 6 and 7. Said blocks are retained in the fork by semicircular ribsG, eX- tending the length of the blocks and adapted to fit incorresponding grooves in the sides of the fork, as seen in Fig. 7. Theribs of the blocks, though close-fittin g in the grooves, are free tomove or rock in the grooves, thereby allowing the faces of the block toadjust themselves to the line-of the shaft or the crank thereof, in theevent there should occur any variation in the lineal relation of theconnecting parts. Hence there can` be no cramping of the bifurcated endof the lever B in its connection with the wrist or crank of the shaft.

The peculiar device for regulating the feed of the machine-that is, forvarying the length of the stitch and for operatiugthe feedcousists of afeed-cam, H, secured to the under side of the bed-plate I of the machineby a bolt, on which the said feed-cam isv free to revolve when operatedby means presently shown.

The peculiar shape of the cam will be seen on examination of Figs. 2 and8,"in which it will be observed that the said cam consists of atubular-like shell provided with differential radial linesthat is tosay, the axial line of thecaln is not equidistant from its externalsurface at its-upper end, and it gradually lessens downward to the linea, below which it continues straight or cylindrical to the end, as

shawn in Fig. 8. Further attention will be called to this part of themachine.

J, Fig.'1, is a connecting-rod, the upper end of which is attached tothe crank (l ofthe shaft C. To the lower end Yof the rod J is secured anadjustable block, K, Fig. 3,which is movable 'vertically upon the rod,and secured in p positionfor the desired feed by means of the set-screwK. In the side of the block facing thecam His a groove, in which is heldfirmly a block of rawhide, K, so adjusted as to be in tactual relationwith the feed-cam H, as seen in Fig. 3, and upon Which'it slides for0perating the feed, as presently shown.

L is the feed-lever, on one end of which is a grooved roller, M, Figs. land 2, so arranged in relation to the connecting-rod J that the backpiece, N, of the above-said block Kis adapted vto fit and move in thegroove of the roller, as seenin Figs. 2,- 3; also, to the end of thelever near to the grooved roller is firmly secured a boot-shaped cam, O,Figs. 1,3, a de- .e

runs a roller, P, pivoted to the side of the vibratory lever B. Therelation of the said lever, roller, cam, and feed-lever L is seen inFig. 1. To the opposite end of the feed-lever IOO is secured the feed Q,Fig. 1, passing upward into a slot, b, in the feed-plate ofthe machinein the ordinary way.

The practical operation of the above-described devices for actuating thefeed is as follows: As the crank G above alluded to revolves a verticalmovement is given to the feed to raise it above the face of thefeed-plate by the vibratory stroke of the lever B, which, as itvibrates, the roller P, by virtue of the vibratory movement of thelever, rolls up the incline of they cam 0, as seen in Fig. 3, therebydepressing theroller end of the feed-lever L and at the same timelifting upward the opposite end, projecting the feed Q above the face ofthe feed-plate, as seen in Fig. 1. During this upward movement of thefeed the block K is at the lower end of the feed-cam H, as seen in Fig.1, and momentarily at rest on the cylindrical part e ofthe cam H, Figs.3 and 8, and at the same time the roller P is moving along the tread ofthe cam O from the point X to about the point X', Figs. 11 and 23,during which time the feed is not moved vertically, as that part of thecam O is of the same are of a circle as that described by the end of thevibrating lever B or roller P. The continued vibration of the lever Bcarries the roller from the point X' to X" of the cam O, and in passingX the feed is raised as the roller P moves in the direction of X", andreversely on the return of said roller. Hence the feed is raised andlowered on the backward-and-forward motion of the roller on the cam O.There is no further elevation of the feed by the continued ascent of theroller upon the cam from c to X. `While the rolleris passing up saidpart X of thecam to the point Xll and returning therefrom .the block Kis passing up the incline of the cam H. A transverse movementis given tothe feed in direction of the arrow in Fig. 2 by the said upwardmoveinentof the block K, carried upward by the crank C andconnecting-rod J. As the block Kmoves upward over the face of the cam Hthe swell of the upper part thereof pushestheblockandthatendofthefeed-leverincontact therewith by means of theroller in the direction of the arrow in Fig. 3, causing the opposite endof the feerllever to move in the direction of the arrow in Fig. 2, asaforesaid, thereby carrying the feed the length of a stitch. During thistransverse movement of the elevated feed the rotative action of thecrank G reacts upon the vibratory lever B, causing the roller P to rolldown the incline of the cam O, thereby permitting the cam end of thefeed-lever L to rise upward by the resiliency of the spring R, Fig. 2,which, as a consequence, depresses the opposite end ofthe lever andsinks the feed below the face of the feed-plate, at the same time theaction of the spring moving the now-depressed feed back in the oppositedirection from that above described-that is, in the opposite directionof the arrow in Fig. 2. This the spring can do, for the moment theroller has moved down the incline of the cam O the block K slides downto the foot of the cam H to the cylindrical part e. At this time theaction of the feed is momentarily inactive-that is, duringthe forwardthrow of the shuttle. While the shuttle is returning the alternate andintermittent action of the feed mechanism is again repeated, as abovedescribed-that is to say, the reciprocating transverse action of thefeed is effected by the co-operation of the cam H, block K, lever L, andspring R, and the alternatingvertical action of the feed is accomplishedby the co-operation of the cam O,roller P, and spring It, with theirrespective connections, with the crank C and feed-lever L, substantiallyas set forth.

D, Figs. 1 and 2, is the shuttle-lever. Said lever has its vibratoryaxis at T, and is secured by a set-screw, c', Figs. 1, 18, to a shaft,U, so that it may be vertically adjusted on the shaft for regulating theheight of the shuttle. The shaft alluded to is provided with centerpoints fitted in suitable steps or bearings, V and W, Figs. 1, 2, and18. The step V is a fixture, whereas the step XV consists of a screw setin the clamp A', by which the screw is held securely from becomingloose, and by which, as the pivotal centers or bearings may become worn,the screw-bearing can be set up to make the bearings close-fitting.

The shuttle-carrier consists of a cradle, B', secured by set-screws f,Fig. 9, to the crosshead D', having a shank, E', adapted to tit in aslit socket terminating the end of the shuttlelever D, as shown in Fig.12.

The shank E is preferably round and tits into a corresponding socket,which admits of a torsional movement of the cradle by turning the shankin the slit socket E, and the shank E is securely held in position by aset-screw passing through ears projecting from the socket ou each sideof the slit. .v The sides of the said slit are drawn together forclamping the shank of the shuttle cradle or carrier by a. screw insertedin ears projecting from the sides of the slit. One ear, E", only isshown in the sectional view of the socket and stem of the crosshead D.In attaching the shuttle-carrier to the arm or lever D, as abovedescribed, the shuttle can be easily and readily adjusted in ahorizontal position without bending or twisting the lever for thatpurpose, and by means of the set-screws f the shuttle can be nicelyadjusted in its transverse relation to the needle.

Fig. 19 is a vertical section of the face-plate and its mechanism in thedirection of the line n; x, Fig. 4; Fig. 20, a transverse section in thedirection of the line m in Fig. 4; Fig. 21, a transverse section in thedirection of the line m so in Fig. 4; Fig. 22, an enlarged view of Fig.15, and Fig. 23 an enlarged view of Fig. 11.

0n examination of the drawings it will be observed that the needle-bar Gdoes not extend up through the top of the face-plate H of the machine.The ripper end of the bar terminates within the chamber of the face, andis secured to a cross-head, I', provided with a IIO heart-shapedcam-groove, m a', Fig. 4. Said groove is adapted to receive the rollerJ' on the pintle projecting from the face ot' the crankwheel K'", Fig.5, secured to the main shaft C', above referred to.

The needle-bar is operated by means of the .v roller Jon the pintle ofthe crank, in connection with the groove m a', by means of which areciprocating movement is given to the ncedle-bar in the ordinary way.

The needle-bar is retained in a vertical position by the guides 1 and 2,between which itslides, and is prevented from leavingvthe guides by agib or plate, L', Fig. 21, an integral part ot' the guide l, which isadjustable laterally by the set-screw G", Fig. 20,10 make close theguides to the bar when worn loose.

To render the bar light a slot or groove, b', is cut longitudinallytherein, thereby reducing it in weight, and not being extended upthrough the top of the face H of the machine the weight of theneedle-bar is materially lesseued, so that the machine will run lightlyand casilyfor havingless metal to carry; also the above-said groove inthe needle-bar serves to make the connection of the cross-head theretomore secure and durablev by means of a rib on the back of the cross-headadapted to titin the groove, thereby preventing the cross head frombecoming loose laterally, Fig. 20.

On the end of the needle-bar is secured a needle-clamp, which is also athread-guide. Said clamp `and thread-guide consists of abolt having abroad head, m', Figs. 15 and 22. The stem or shank of the bolt passesthrough the need]c-bar,as indicated ati", Fig. 19, on which is screwedthe thumb-nut h for drawing the head of the bolt upon the needleinserted in the groove r for clamping it to the bar. The said bolt orneedle-clamp to be used as a guide for the thread has cut in the headthereof, parallel with the plane or top of the head, a slit, r',extending therein to about the dotted line c". The width of the slit issufficient to freely admit the thread used in se ing. ln the outer edgeor side of the slit is a notch, Z, through which projects from the innerside of the slit a pin, c.

The practical use of the guide is as follows: The thread from the spoolis passed under the pin c', which is easily done by catching it nnderthe projecting end thereof and then drawing it down under the pin in thenotch l into the slit r' in the head of the clamp. When therein itcannot come ont laterally, as the pin projecting across the slit willprevent it unless the thread is pulled upward around the pin and pushedtherefrom through the notch.

A further improvement consists of an index for gaging the length of thestitch, and a device for adjusting the feed-cam for that purpose, ofwhich the following is a description.

To the upper end of the feed-cam H, above described, is secured apinion,f', adapted to engage the teeth of a rack, M', Fig. 3. Said rackextends from the pinion f' of the cam across to a pinion, g, secured toa shaft, h', projecting up through the bed-plate ot' the machine, asseen in Fig. 3. To the end of the shaft above the bed-plate is secured adial, N', and on the lower end is the pinion g, above alluded to,engaging the opposite end of the rack M', as seen in Fig. 3. On thefaceofthe dial are numerals 1, 2, 3, &c., with intermediate marks, forming ascale, as seen in Fig. 17.

In order to rotate the feed-cam Hto bring the full side thereof` more orless to the block K for vibrating the feed-lever, the dial is ro tated,thereby moving the rack M' bythe pinion g, which will also at the sametime rotate the feed-cam in veither direction, as the dial may beturned.

Figure l on the dial indicatesa given short stitch used for line thread,and ligure 8 a long stitch for coarse thread. To set the machine toobtain the short stitch, the dial is turned so that iigurel will be atthe pointer p. This will turn the feed-cam so that its shortest throwwill act upon the block K and vibrate the feed-lever the least degreeand make the shortest stitch. The long stitch is made by turning thefull side ofthe cam to the block K. This is done by rotating the dial sothat the figure 8 will be at the pointer, and so ot' the intermediatenumbers, according to the coarseness of the thread or the neness of thestitching required. By this means the saine length of stitch can alwaysbe obtaned,though many changes may have been made for various work. Thesame exact length of stitch can always be had by turning the numerals ofthe dial to the pointer, thereby saving experimental trials ordinarilymade to get the length of stitch desired or the one previously used andagain wanted.

That the feed in its reciprocating action may travel in a right lineinstead of the arc of a circle described by the end of the feed-leveractuating the feed, said lfeed is attached to the end of the lever, asfollows: The feed is provided with a shank, Q', Figs. 1 and 16,terminating in a round stem or spindle, It', fitting closely, butmovably, in a sleeve, S', having auarm, T', whereby the sleeve issecured to the end of the feed-lever L by a screw, j, as

"seen in Fig. 1. 0n the end of the spindle is a collar, .e', Fig.. 16,secured thereto by a pin, o, otherwise inserted through the collar andthe spindle of the feed, thereby holding the said spindle in the sleevefrom coming out. The spindle, by being free'to rotate in the sleeve,allows the feed to reciprocate horizontally in a right line, while thefced-lever vibrates and the end thereof describes an arc of a circle,which the feed would do were its spindle not free to rotate in thesleeve and thereby permit the feed to move in the straight slotin thefeed-plate, which serves as a guide for the movement of the feed in aright line, that the work may be carried straight along under theneedle.

The take-up D2 is of ordinary construction,

IOO

IOS

IIO

and is operated by the cam D3. detail in Figs. 13 and 14.)

'hat we claim as our invention, and desire to secure by Letters Patent,is-

1. In a sewing-machine, the combination, with the driving-shaft C' andthe crank C, of the bifnrcatedleverB, the self-adjusting blocks E and F,provided with longitudinal semicircular ribs adapted to fit and movcfreely in corresponding grooves in the bifurcations of said lever B,substantially as shown and described.

2. In a sewing-machine, the combination, with the cam H, havingirregular and cylindrical portions, as described, of the feedlever L,the block K, and mechanism for reciprocating the said block K,substantially as and for the purpose set forth.

3. In a sewing-machine, the combination, with the feed-cam H, havingirregular and cylindrical parts, as described, ot' the feed-lever L,block K, rod J, crank C, and shaft C', substantially as and for thepurpose set forth.

4. In combination with the feed-ean1 and fced-lever, provided with agrooved roller, an adjustable feeding-block having an anti-frictionfacing, and the back of the said block being adapted to movein thegroove of the said roller, substantially as set forth, and for thepurpose specified.

5. In a sewing-machine with the feed-cam H and pinion f', thecombination of the rack M', pinion g, and thnrnbpiece or button N',substantially as and for the purpose set forth.

6. In combination with the feed-lever of a sewing-machine and bifurcatedlever B and roller, the cam O, substantially as described, and for thepurpose specified.

7. The bifnrcated sh uttle-lever D, secured to its rock-shaft, and adjnstable thereon by means of a set-screw for regulating the height of theshuttle, in combination with the lever B and shaft C', substantially asand for the purpose set forth. A

S. In a sewing-machine, the combination, with the shuttle-lever D,provided with a slit cylindrical socket, of the cross-head D', having acylindrical shank and means for secur- (Shown in ing said shank in saidsocket, whereby the shank may be adjusted longitiulinallyandtorsiona-lly, substantially as set forth.

I). In combination with the cross-head D', the shuttleeradle connectedthereto by setscrewsjinserted in slotted openings 7c, for adjusting'saidcradle and shuttle therein, for the n purpose specified.

10. The combination, with the face-plate H' and theneedle-barG', oftheadjustable guide 1, havinga gib or plate, L',formed integraltherewith, and the stationary guide 2, said guides and needle-bar beingarranged Within the interior of the face-plate, substantially as and forthe purpose set forth.

l1. In a sewing-machine, the thumb-piece or button N', having on thesurface or face thereof a numerical scale, a', index or pointer pandpinion g, in combination with the rack M', pinion f', and feed cam H, inthe manner substantially as `and for the purpose set forth.

12. In a sewing1nachine,a combined needle-clamp and thread-guide,consisting ofa bolt having a slit in the side ot' the head thereofparallel with the plane or top of said head, and a notch in the outerside of the slit, through which projects a pin fixed in the inner sideof the slit, and secured to the needle-bar by a. thumbnut, substantiallyas herein shown and described.

13. In a sewing-machine, the combination of the center-pointed shaft U,carrying the adjustable shuttle-lever D, step V, adjusting` screw, step\V, and clamp A', substantially as and for the purpose set forth.

14. The combination, with the feed-lever L, of the feed, provided with acylindrical shank or spindle, the sleeve S', having an arm, T', thecollar or cap U', and pin O, substantially as and for the purpose setforth.

In testimony whereof we afx our signatures in presence of two witnesses.

JAMES TRIPP. JOHN II. OSBOR.

Witnesses:

M. L. DEER-ING, J. II. BURmDGE.

